JP4179892B2

JP4179892B2 - Connection joint and repair joint

Info

Publication number: JP4179892B2
Application number: JP2003026624A
Authority: JP
Inventors: 廣高橋; 聡越智; 洋一窪田; 禎一後藤; 潤原田; 悦雄増田
Original assignee: Tokyo Metropolitan Government; Kubota CI Co Ltd
Current assignee: Tokyo Metropolitan Government; Kubota CI Co Ltd
Priority date: 2003-02-04
Filing date: 2003-02-04
Publication date: 2008-11-12
Anticipated expiration: 2023-02-04
Also published as: JP2004239299A

Description

【０００１】
【産業上の利用分野】
この発明は接続継手および補修用継手に関し、特にたとえば、陶管やヒューム管等と合成樹脂製管とを接続するための接続継手、および陶管等で形成された下水管路の補修に使用する、補修用継手に関する。
【０００２】
【従来技術】
下水管としてたとえば陶管やヒューム管等が使用されている。このような陶管等で形成された既設下水管路の一部がたとえば破損した場合は、図１３に示すように、たとえば陶管製の下水管路１のその破損個所を切断して撤去する。そして、下水管路１の上流側管路２の端部（差口）２ａと、下流側管路３の受口３ａとの間に合成樹脂製の補修用継手４を取り付けて補修する（たとえば、非特許文献１参照。）。
【０００３】
この合成樹脂製の補修用継手４は、図１３に示すように、第１接続継手５と第２接続継手６とを備えている。第１接続継手５は、第１短管部５ａを有している。この第１短管部５ａの一端には、陶管が接続される第１受口５ｂが形成されており、他端には差口５ｃが形成されている。第２接続継手６は、第２短管部６ａを有している。この第２短管部６ａの一端には、陶管の受口３ａに受容される差口６ｂが形成されており、他端には第１短管部５ａの差口５ｃを受容するゴム輪受口６ｃが形成されている。
【０００４】
【非特許文献１】
編者「塩化ビニル管・継手協会」、「ＪＰＰＦＡ下水道用硬質塩化ビニル管ＡＳ１９」、平成１４年７月１日改正、第１５頁
【０００５】
【発明が解決しようとする課題】
しかし、図１３に示す従来の補修用継手４では、下水管路１の切断によって形成された上流側管路２の差口２ａの管底２ｂと、第１短管部５ａの管底５ｄとの高さをたとえば一致させることが困難である。なぜなら、上流側管路２の差口２ａを第１受口５ｂに接続するときは、差口２ａの外周面と第１受口５ｂの内周面との間の隙間５ｅに、モルタル等の接合材７を充填するので、この隙間５ｅを必ず必要とするが、この隙間５ｅの寸法を正確に設定することが困難だからである。この隙間５ｅの寸法を正確に設定できないのは、第１受口５ｂを差口２ａに対して位置決めできないからである。たとえば差口２ａの管底付近の隙間５ｅが狭くなると、この接合部における差口２ａの管底２ｂが第１短管部５ａの管底５ｄよりも低くなり、逆段差ができてしまう。
【０００６】
【課題を解決するための手段】
第１の発明は、短管部の一端に陶管やヒューム管等の端部を受容するための受口が形成され、受口の内面と端部の外面との隙間が接合材によって封止される合成樹脂製の接続継手において、端部の管底を位置決めし、かつ隙間に充填される接合材の流出を抑制するための突起を、受口の開口縁部の内面の周方向に沿って所定の範囲に亘って形成したことを特徴とする、接続継手である。
【０００７】
第２の発明は、第１および第２短管部のそれぞれの一端に陶管やヒューム管等の端部を受容するための第１および第２受口が形成され、第１および第２受口の内面と端部の外面とのそれぞれの隙間が接合材によって封止される、かつ第２短管部の他端に第１短管部の他端に形成された差口を受容するゴム輪受口が形成された合成樹脂製の補修用継手において、端部の管底を位置決めし、かつ隙間に充填される接合材の流出を抑制するための突起を、第１および第２受口のそれぞれの開口縁部の内面の周方向に沿って所定の範囲に亘って形成したことを特徴とする、補修用継手である。
【０００８】
それゆえに、この発明の主たる目的は、陶管等との接合部に逆段差を生じることがなく、比較的狭い掘削孔で陶管等で形成された管路の補修ができる、接続継手および補修用継手を提供することである。
【０００９】
【課題を解決するための手段】
第１の発明は、短管部の一端に陶管やヒューム管等の端部を受容するための受口が形成され、受口と端部との隙間が接合材によって封止される合成樹脂製の接続継手において、受口の内側に端部の管底を位置決めするための突起を形成したことを特徴とする、接続継手である。
【００１０】
第２の発明は、第１および第２短管部のそれぞれの一端に陶管やヒューム管等の端部を受容するための第１および第２受口が形成され、第１および第２受口と端部とのそれぞれの隙間が接合材によって封止される、かつ、第２短管部の他端に第１短管部の他端に形成された差口を受容するゴム輪受口が形成された合成樹脂製の補修用継手であって、第１および第２受口のそれぞれの内側に陶管等の端部の管底を位置決めするための突起を形成したことを特徴とする、補修用継手である。
【００１１】
【作用】
第１および第２の発明によると、受口，第１受口および第２受口（以下、単に「受口」と言う。）に陶管やヒューム管等の差口を接続できる。陶管等の差口を受口に接続するときは、この差口を受口内に嵌め込んで突起に載置する。これによって、短管部，第１短管部および第２短管部（以下、単に「短管部」と言う。）に対する陶管等の差口の位置決めができる。このように位置決めができるので、それぞれの短管部の管底と、各短管部に接続される陶管等の管底とをたとえば同一の高さにすることができる。
【００１２】
また、受口に切欠を形成した場合は、陶管等の差口を受口内の突起に載置した状態で、この切欠からモルタル等の接合材を供給して、差口と受口との間に形成されている隙間にこの接合材を充填することができる。このようにして、差口と受口との隙間を接合材で密封して両者を結合することができる。よって、たとえば掘削壁面から突出する陶管等の差口に対して、受口を嵌め込んだ状態で、受口の開口縁部と掘削壁面との間のスペースが狭い場合でも、接合材をそのスペースと切欠との合計スペースから確実に充填できる。したがって、受口の開口縁部と掘削壁面との間に接合材充填用の比較的広いスペースを確保する必要がなく、切欠の分だけ掘削広さを狭くすることができ経済的である。
【００１３】
第１の発明に係る接続継手によると、この短管部の他端をたとえば差口またはゴム輪受口として形成すると、この他端をたとえば合成樹脂製のゴム輪受口または差口に接合できる。これによって、陶管等と合成樹脂製管とをこの接続継手を介して接続できる。
【００１４】
第２の発明に係る補修用継手を使用して、たとえば陶管で形成された埋設既設下水管路を補修するときは、まず、地面を掘削して既設下水管路の破損等の個所を露出させる。そして、既設下水管路のたとえば破損部分を切断して除去する。次に、この切断によって形成された既設下水管路の上流側管路の差口と下流側管路の差口との間にこの補修用継手を取り付ける。そして、第１および第２の各受口の内周面と、上流側および下流側の各差口の外周面との間の隙間に接合材を充填する。そして、掘削孔を埋め戻すことによって、既設下水管路の破損個所の補修が終了する。
【００１５】
なお、第１受口は、既設下水管路を切断して形成された２つの差口のうち、上流側差口に接続され、第２受口は下流側差口に接続される。そして、第１短管部と第２短管部とは、ゴム輪接合されているので、この補修用継手を伸縮させることができる。よって、上流側差口と下流側差口との間隔に応じて補修用継手の長さを調節できる。
【００１６】
【発明の効果】
第１および第２の発明によると、短管部，第１短管部および第２短管部のそれぞれの管底と、各短管部に接続される陶管等の管底とを位置決めすることができるので、互いに接続される管底が同一の高さとなるように接続することができる。したがって、この接続部およびその上流側に下水や泥等が溜まらないようにできる。
【００１７】
また、第２の発明の補修用継手では、この継手の両端の第１および第２受口を、既設管路の切断端部（差口）に接続するものであるから、既設管路の端部に受口が配置されるように掘削する必要がない。よって、図１３に示す従来のように、既設管路の受口を露出させるために掘削孔を広げる必要がなく経済的である。
【００１８】
この発明の上述の目的，その他の目的，特徴および利点は、図面を参照して行う以下の実施例の詳細な説明から一層明らかとなろう。
【００１９】
【実施例】
この発明の第１実施例に係る補修用継手を図１〜図７を参照して説明する。この補修用継手１０は、合成樹脂製であり、図１に示すように、とえば陶管やヒューム管等によって形成された埋設既設下水管路１２の一部がたとえば破損した場合に、その破損個所を補修することができるものである。この補修用継手１０は、図１に示すように、第１接続継手１４と第２接続継手１６とを備えている。
【００２０】
第１接続継手１４は、図１に示すように、第１短管部１８を有している。この第１短管部１８の一端には、たとえば陶管の差口２０が接続される第１受口２２が形成されており、他端には差口２４が形成されている。第１受口２２は、その内径が第１短管部１８の内径よりも大きく、かつその中心が第１短管部１８の中心と一致している。そして、下水管路１２を構成する陶管２６は、図２（Ａ）に示すように、短管部２６ａおよび受口２６ｂを備えている。
【００２１】
そして、第１受口２２の内面には、陶管２６の管底位置決め用の突起２８が形成されている。この突起２８は、図１に示すように、上流側管路３０の差口（上流側差口）２０を第１受口２２内に嵌め込んだ状態で、上流側差口２０の管底（内面）２０ａおよび第１短管部１８の管底（内面）１８ａが同一の高さとなるように、高さＨ１に形成されている。そして、この突起２８は、図３に示すように、それぞれが同一の形状であり、断面形状が矩形の３つの円弧状部材からなっている。この３つの突起２８の上面は、上流側差口２０の外面と当接する曲率で形成されている。そして、各突起２８は、第１受口２２の底から両側に、第１受口２２の周方向に沿ってθ１（≒１２０°）の範囲にわたってそれぞれが所定の間隔を隔てて同一の高さＨ１で形成されている。この３つの突起２８は、第１受口２２の内面に接着されており、これらの上面に当接する上流側差口２０と第１受口２２との位置関係がずれないように安定して保持できる。
【００２２】
また、各突起２８は、図３（Ａ）に示すように、第１受口２２の開口縁の内面に沿って形成されている。このように、各突起２８を開口縁に沿い、かつ、第１受口２２の下部に形成してあるので、上流側差口２０の外周面と、第１受口２２の内周面との隙間３６に充填されるモルタル，エポキシ等の接合材３２が、この隙間３６のうち突起２８が形成されている範囲の部分から流出するのを抑制できる。さらに、各突起２８の幅Ｗ１は、第１受口２２の幅（奥行き）Ｗ２の約１４％である。このように、各突起２８の幅Ｗ１を設定することによって、上流側差口２０の外周面と、第１受口２２の内周面との隙間３６を接合材３２によって、確実に密封できるし、両者を確実に結合することができる。
【００２３】
さらに、図３に示すように、第１受口２２の開口縁における頂部（上部）には、第１受口２２の周方向に沿ってθ２（≒９０°）の範囲にわたって接合材充填用の切欠３４が形成されている。この切欠３４の幅（第１受口２２の奥行き方向の幅）Ｗ３は、第１受口２２の幅Ｗ２の約３６％である。このように、切欠３４の幅Ｗ３を設定することによって、この切欠３４を含むスペースＫ１から接合材３２をたとえば手で供給して、上流側差口２０の外周面と、第１受口２２の内周面との隙間３６に接合材３２を充填できる。そして、この隙間３６を確実に密封できるし、両者を確実に結合することができる。
【００２４】
第２接続継手１６は、図１に示すように、第２短管部３８を有している。この第２短管部３８の一端には、たとえば陶管の差口（下流側管路４４の差口）４６が接続される第２受口４０が形成されており、他端にはゴム輪受口４２が形成されている。ゴム輪受口４２は、第２短管部３８と同径に形成されており、開口端部の内周に沿って環状のゴム輪受容部４２ａが形成されている。このゴム輪受容部４２ａにはゴム輪４２ｂが装着されている。このゴム輪受口４２は、第１短管部１８の差口２４が接合されるように形成されている。
【００２５】
第２受口４０は、図４に示すように、第１受口２２と同等の大きさおよび形状であり、陶管（下流側差口４６）の管底位置決め用の３つの突起２８、および接合材充填用の切欠３４が形成されている。これら３つの突起２８および切欠３４は、第１受口２２に設けられているものと同等のものである。
【００２６】
ただし、第２受口４０は、その中心が第２短管部３８の中心よりもこの第２短管部３８の管底３８ａ側にＳ１だけ偏心して形成されている。この偏心量Ｓ１は、第１短管部１８の厚み、および第１短管部１８と第２短管部３８との隙間の合計の寸法である。これによって、図１に示すように、下流側差口４６を第２受口４０内に嵌め込んだ状態で、下流側差口４６の管底（内面）４６ａおよび第２短管部３８の管底（内面）３８ａが同一の高さとなる。
【００２７】
そして、第２受口４０の中心を、第２短管部３８の中心よりもこの第２短管部３８の管底３８ａ側にＳ１だけ偏心させているのは、偏心させていないとすると、下流側差口４６の管底４６ａが第１短管部１８の管底１８ａの高さに一致するが、下流側差口４６の管底４６ａが第２短管部３８の管底３８ａよりも第１短管部１８の厚み、および第１短管部１８と第２短管部３８との隙間の合計の寸法分（偏心量Ｓ１の分）だけ高くなり、逆段差となるからである。したがって、第２受口４０に形成されている突起２８の高さＨ１を、第１短管部１８の厚み、および第１短管部１８と第２短管部３８との隙間の合計の寸法分Ｓ１だけ低く形成することによって、第２受口４０の中心をＳ１だけ偏心させることなく（第２受口４０および第２短管部３８の各中心を一致させる）、下流側差口４６の管底４６ａを第２短管部３８の管底３８ａの高さに一致させることができる。
【００２８】
また、図１に示すように、第１受口２２の突起２８の高さをＨ１とすることによって、上流側差口２０および第１短管部１８の各管底２０ａ，１８ａの高さを一致させたが、これに代えて、第１受口２２の突起２８の高さをＨ１よりも少し高くしてもよい。そして、第２受口４０の突起２８の高さをＨ１とすることによって、下流側差口４６および第２短管部３８の各管底４６ａ，３８ａの高さを一致させたが、これに代えて、第２受口４０の突起２８の高さをＨ１よりも少し低くしてもよい。このようにすると、上流側差口２０の管底２０ａが第１短管部１８の管底１８ａよりも高くなり、第２短管部３８の管底３８ａが下流側差口４６の管底４６ａよりも高くなる。下水は、各接合部に溜まることなくスムースに流下する。
【００２９】
図５は、図１に示す補修用継手１０の平面図であり、第１および第２接続継手１４，１６のそれぞれの切欠３４から表れている突起２８の形状を示している。図６は、図１に示す補修用継手１０の左側面図および右側面図であり、第２受口４０が第１受口２２に対して偏心している状態を示している。
【００３０】
次に、この補修用継手１０を使用して、たとえば埋設された陶管製の既設下水管路１２を補修する手順を、図１および図２を参照して説明する。まず、既設下水管路１２の破損や水漏れ等の個所を調査する。そして、図２（Ａ）に示すように、その破損等の個所を露出させるために、地面を掘削して掘削孔４８を形成する。この場合、たとえば陶管２６の受口２６ｂと差口との接合部から漏水しているとすると、この漏水個所を除去するために、図２（Ｂ）に示すように、既設下水管路１２の漏水個所を切断する。この際、この切断によって形成された既設下水管路１２の上流側差口２０および下流側差口４６のそれぞれの突出長さはＫ２である。次に、図１に示すように、この切断によって形成された上流側差口２０と下流側差口４６との間にこの補修用継手１０を取り付ける。
【００３１】
補修用継手１０を取り付けるときは、まず、たとえば地上において、この補修用継手１０の第１および第２受口２２，４０内であって、突起２８が形成されている範囲、またはその程度の範囲に接合材３２を充填する。地上で予め接合材３２を充填するのは、掘削孔４８内で充填するよりも作業性がよいからである。そして、接合材３２を突起２８が形成されている範囲等に充填するのは、突起２８が形成された部分が下側となるようにこの補修用継手１０が取り付けられた状態で、接合材３２がその充填された部分から脱落し難いからである。
【００３２】
そして、図１に示すように、たとえば上流側差口２０を第１受口２２内にその奥まで嵌め込んで突起２８に当てがい、上流側差口２０に対する第１受口２２の位置決めを行う。この突起２８は、下側となるように配置される。そして、この当てがった状態を保持するために、この第１受口２２を土等の固定材５０で固定する。同様に、下流側差口４６を第２受口４０内にその奥まで嵌め込んで突起２８に当てがい、下流側差口４６に対する第２受口４０の位置決めを行う。この突起２８は、下側となるように配置される。そして、この当てがった状態を保持するために、この第２受口４０を土等の固定材５０で固定する。この状態で、陶管製の既設下水管路１２の上流側差口２０および第１短管部１８のそれぞれの管底２０ａ，１８ａの高さが同一となっており、下流側差口４６および第２短管部３８のそれぞれの管底４６ａ，３８ａの高さも同一となっている。
【００３３】
次に、第１および第２受口２２，４０に形成されている各切欠３４を含むスペースＫ１からモルタル等の接合材３２を供給して、上流側差口２０の外周面と第１受口２２の内周面との間に形成されている隙間３６、および下流側差口４６の外周面と第２受口４０の内周面との間に形成されている隙間３６に接合材３２を充填する。そして、この充填された接合材３２が固化すると、上流側差口２０と第１受口２２との隙間３６、および下流側差口４６と第２受口４０との隙間３６がこの接合材３２で密封されて、上流側差口２０および第１受口２２、ならびに下流側差口４６および第２受口４０のそれぞれが互いに結合する。しかる後に、掘削孔４８の埋め戻しを行う。これによって、既設下水管路１２の破損個所の補修が終了する。
【００３４】
図１に示す補修用継手１０によると、上流側差口２０および第１短管部１８のそれぞれの管底２０ａ，１８ａが同一の高さとなるように、さらに、第２短管部３８および下流側差口４６のそれぞれの管底３８ａ，４６ａが同一の高さとなるように、上流側および下流側の各差口２０，４６を突起２８によって位置決めできる。したがって、各接続部およびその上流側に下水や泥等が溜まらないようにできる。
【００３５】
そして、掘削壁面４８ａから突出するたとえば上流側差口２０に対して、第１受口２２を嵌め込んだ状態で、第１受口２２の開口縁部２２ａと掘削壁面４８ａとの間のスペース（間隔）Ｋ３が、接合材３２を充填するのに必要とするスペースＫ１よりも狭い場合でも、切欠３４が形成されているので、接合材３２をそのスペースＫ３と、切欠３４のスペースＷ３との合計スペースＫ１から確実に充填できる。したがって、第１受口２２の開口縁部２２ａと掘削壁面４８ａとの間に接合材充填用の比較的広いスペースＫ１を確保する必要がなく、スペースＫ３を確保するだけでよく、切欠３４のスペースＷ３（＝Ｋ１−Ｋ３）だけ掘削孔４８の掘削広さを狭くすることができ経済的である。なお、第２受口４０の開口縁部４０ａと掘削壁面４８ａとの間のスペース（間隔）もＫ３で済むので、掘削広さを合計２×Ｗ３だけ図１３に示す従来の場合よりも狭くすることができる。そしてこの場合、上流側および下流側差口２０，４６の掘削壁面４８ａからの各突出長さＫ２は、図１３に示す場合よりもそれぞれＷ３だけ短くすることができる。
【００３６】
また、従来では、図１３に示すように、掘削壁面４８ａから突出する下流側管路３の端部に、陶管の受口３ａが配置されている必要があるので、受口３ａが露出するまで掘削孔４８を広げる必要がある。これに対して、この補修用継手１０では、両端の第１および第２受口２２，４０を、上流側および下流側の各差口（切断端部）２０，４６に接続するものであるから、下流側端部に受口３ａが配置されるように掘削する必要がない。よって、陶管の受口３ａを露出させるために、掘削孔４８を広げる必要がなく経済的である。
【００３７】
なお、第１短管部１８の差口２４と、第２短管部３８のゴム輪受口４２とは、ゴム輪接合されているので、この補修用継手１０を伸縮させることができる。よって、上流側差口２０と下流側差口４６との間隔に応じてこの補修用継手１０の長さを調節できる。図７（Ａ）は、補修用継手１０が伸張している状態であり、図７（Ｂ）は、補修用継手１０が短縮している状態である。
【００３８】
次に、第２実施例の補修用継手５２を図８および図９を参照して説明する。補修用継手の第１実施例と第２実施例とが相違するところは、図１および図８に示すように、第２接続継手５４の形状が相違するところである。
【００３９】
第２実施例の第２接続継手５４は、図８に示すように、第２短管部３８と第２受口４０とが結合する環状の結合部において、その上半円部分よりも広い範囲にわたって縮径部５６が形成されている。これ以外は、第１実施例の補修用継手１０と同等であり、同等部分を同一の図面符号で示し、それらの詳細な説明を省略する。
【００４０】
第２短管部３８に形成されている縮径部５６は、ゴム輪受口４２側に形成されている円筒状部に続いて形成され、管軸に対して所定角度で傾斜して、管軸に接近しながら第２受口４０に向かって延びている。そして、この縮径部５６は、第２受口４０の奥部に形成されている漏斗状の傾斜部５８と結合している。図９は、第２接続継手５４を第２受口４０の側から見た図である。
【００４１】
図８に示す補修用継手１０によると、第１接続継手１４の差口２４を第２接続継手５４のゴム輪受口４２に接合し、そして奥側に向かって挿入したときに、差口２４の先端が縮径部５６の内面に当接して、第１接続継手１４の差口２４がそれよりも奥側に向かって移動しないように係止することができる。したがって、たとえば第１接続継手１４の第１短管部１８が第２接続継手５４の第２短管部３８よりも長い場合でも、第１接続継手１４の差口２４が第２受口４０の内側に進入したり、差口２４が第２受口４０から外側に突出する状態となることを防止できる。つまり、第１接続継手１４の差口２４が第２受口４０の内側に進入する等の状態となっていると、この補修用継手１０を使用するときに、第１接続継手１４の差口２４を第２受口４０の内側の位置、またはそれよりも外側に突出する位置から第２短管部３８の側に移動させる必要があり、このような作業をしなくて済むようにできる。また、第１短管部１８の差口２４が第２受口４０の内側に進入等しないように、縮径部５６で係止する構成としたことによって、第１短管部１８の外面に、第２受口４０内に充填された接合材３２が付着したり、その第１短管部１８の外面に付着した接合材３２が第２短管部３８の内面に付着しないようにすることができる。
【００４２】
次に、第３実施例の補修用継手６０を図１０および図１１を参照して説明する。補修用継手の第２実施例と第３実施例とが相違するところは、図１，図１０および図１１等に示すように、第１および第２接続継手１４，５４の第１および第２受口２２，４０に形成されている管底位置決め用の突起６２、および第１および第２受口２２，４０の突起６２が形成されている部分の形状が相違するところである。
【００４３】
第３実施例において、第１接続継手１４の第１受口２２に形成されている突起６２は、図１０に示すように、第１実施例と同様に、第１受口２２の内側に向かって突出するように形成されている。この突起６２は、上流側差口２０（陶管の差口）を第１受口２２内に嵌め込んだ状態で、上流側差口２０の管底２０ａおよび第１短管部１８の管底１８ａが同一の高さとなるように、高さＨ１に形成されている。そして、この突起６２は、図１０および図１１（Ａ）に示すように、第１受口２２の開口縁部２２ａを内側に屈曲して形成されたものであり、第１受口２２の底から両側に、第１受口２２の周方向に沿ってθ１（≒１２０°）の範囲にわたって同一の高さＨ１で連続して形成されている。これによって、第１実施例と同様に、この突起６２は、この上面に当接する上流側差口２０と第１受口２２との位置関係がずれないように安定して保持できる。また、突起６２は、図１０に示すように、上流側差口２０の外面と面接触するように形成されている。
【００４４】
このように、突起６２を開口縁部２２ａに沿って連続して形成し、かつ、第１受口２２の下部に形成してあるので、上流側差口２０の外周面と、第１受口２２の内周面との隙間３６に充填される接合材３２が、この隙間３６のうちこの突起６２が形成されている範囲の部分から流出するのを確実に防止できる。そして、突起６２は、第１受口２２を屈曲して形成してあるので、突起６２を第１受口２２とは別の部品で形成するよりも部品点数が少なくて済む。
【００４５】
なお、第２受口４０に形成されている突起６２は、図１０および図１１（Ｂ）に示すように、第１受口２２に形成されている突起６２と同等の大きさおよび形状であるので、その説明を省略する。
【００４６】
次に、第４実施例の接続継手６４を図１２を参照して説明する。この接続継手１４は、図１に示す第１実施例の第１接続継手１４と同様に、陶管２６やヒューム管等と接続できるものである。この接続継手６４は、短管部６６の長さを第１接続継手１４の第１短管部１８よりも短く形成したものである。これ以外は、第１実施例の第１接続継手１４と同等であるので、同等部分を同一の図面符号で示し、それらの詳細な説明を省略する。
【００４７】
この接続継手６４によると、図１２に示すように、陶管２６と、たとえばゴム輪受口６８が形成された合成樹脂製の片受け管７０とを接続することができる。このゴム輪受口６８は拡径されているので、互いに接続された陶管２６，接続継手６４の短管部６６，および片受け管７０の本体７０ａのそれぞれの管底２６ｃ，６６ａ，７０ｂを同一の高さにすることができる。
【００４８】
ただし、第１〜第４実施例の第１受口２２等は、陶管２６の差口２０，４６を接続できる大きさおよび形状としたが、これに代えて、ヒューム管の差口を接続できる大きさおよび形状としてもよい。
【００４９】
そして、第１，第２および第４実施例では、第１受口２２等の内面に３つの突起２８を間隔を隔てて形成したが、これに代えて、連続する１つの突起として形成してもよい。また、突起２８は、第１受口２２等の開口縁部２２ａに沿う周方向に延びる円弧状部材として形成したが、これに代えて、管軸方向に延びる直線状部材として形成し、各受口の周方向に間隔を隔てて複数個配置してもよい。
【００５０】
つまり、第１〜第４実施例の第１受口２２等の内面に形成されている突起２８等は、これ以外の形状としてもよいし、突起が形成されている範囲θ１もこれ以外の範囲としてもよい。そして、突起２８等が形成されている第１受口２２等の内面での奥行き方向の位置や奥行き方向の範囲もこれ以外としてもよい。要は、上記第１〜第４実施例と同様の作用、効果を奏するようにすればよい。
【００５１】
また、第４実施例では、図１２に示すように、接続継手６４の短管部６６の一端を差口として形成して、この差口をゴム輪受口６８に接合できるようにしたが、これに代えて、短管部６６の一端の差口をたとえばソケットを介して合成樹脂製管と接着接合できるようにすることができる。さらに、短管部６６の一端にゴム輪受口を形成して、このゴム輪受口に合成樹脂製管の差口を接合できるようにしてもよい。
【００５２】
さらに、第１〜第４実施例では、第１受口２２等に接合材充填用の切欠３４を形成したが、この切欠３４を形成しなくてもよい。
【図面の簡単な説明】
【図１】この発明の第１実施例に係る補修用継手の使用状態を示す縦断面図である。
【図２】（Ａ）は図１の第１実施例に係る補修用継手によって補修される既設下水管路を示す縦断面図、（Ｂ）は図２（Ａ）に示す既設下水管路の破損個所を切断して撤去した状態を示す縦断面図である。
【図３】（Ａ）は図１の第１実施例に係る補修用継手が備える第２接続継手を図３（Ｂ）のＩＩＩＢ−ＩＩＩＢ方向から見た断面図、（Ｂ）は図３（Ａ）に示す第２接続継手の左側面図である。
【図４】（Ａ）は図１の第１実施例に係る補修用継手が備える第２接続継手を図４（Ｂ）のＩＶＡ−ＩＶＡ方向から見た断面図、（Ｂ）は図４（Ａ）に示す第２接続継手の右側面図である。
【図５】図１の第１実施例に係る補修用継手を示す平面図である。
【図６】（Ａ）は図５の第１実施例に係る補修用継手を示す左側面図、（Ｂ）は図５の第１実施例に係る補修用継手を示す右側面図である。
【図７】（Ａ）は図５の第１実施例に係る補修用継手が伸張した状態を示す縦断面図、（Ｂ）は図５の第１実施例に係る補修用継手が短縮した状態を示す縦断面図である。
【図８】この発明の第２実施例に係る補修用継手を示す縦断面図である。
【図９】図８の第２実施例に係る補修用継手が備える第２接続継手の右側面図である。
【図１０】この発明の第３実施例に係る補修用継手の使用状態を示す縦断面図である。
【図１１】（Ａ）は図１０の第３実施例に係る補修用継手を示す左側面図、（Ｂ）は図１０の第３実施例に係る補修用継手を示す右側面図である。
【図１２】この発明の第４実施例に係る補修用継手の使用状態を示す縦断面図である。
【図１３】従来の補修用継手の使用状態を示す縦断面図である。
【符号の説明】
１０，５２，６０ …補修用継手
１２ …既設下水管路
１４ …第１接続継手
１６，５４ …第２接続継手
１８ …第１短管部
１８ａ，２０ａ，２６ｃ，３８ａ，４６ａ，６６ａ …管底
２０ …上流側差口
２２ …第１受口
２２ａ，４０ａ …開口縁部
２４ …差口
２８，６２ …突起
３０ …上流側管路
３２ …接合材
３４ …切欠
３６ …隙間
３８ …第２短管部
４０ …第２受口
４２ …ゴム輪受口
４４ …下流側管路
４６ …下流側差口
５６ …縮径部
６４ …接続継手
６６ …短管部[0001]
[Industrial application fields]
TECHNICAL FIELD The present invention relates to a connection joint and a repair joint, and in particular, for example, a connection joint for connecting a ceramic pipe, a fume pipe and the like to a synthetic resin pipe, and a sewage pipe formed by the ceramic pipe and the like. , Relating to repair joints.
[0002]
[Prior art]
As a sewer pipe, for example, a ceramic pipe or a fume pipe is used. When a part of the existing sewage pipe formed with such a ceramic pipe is damaged, for example, as shown in FIG. 13, the damaged portion of the sewage pipe 1 made of ceramic pipe is cut and removed. . Then, a repair joint 4 made of synthetic resin is attached between the end (differential port) 2a of the upstream pipeline 2 of the sewage pipeline 1 and the receiving port 3a of the downstream pipeline 3 for repair (for example, Non-patent document 1).
[0003]
This synthetic resin repair joint 4 includes a first connection joint 5 and a second connection joint 6, as shown in FIG. The first connection joint 5 has a first short pipe portion 5a. A first receiving port 5b to which a ceramic pipe is connected is formed at one end of the first short tube portion 5a, and a differential port 5c is formed at the other end. The 2nd connection coupling 6 has the 2nd short pipe part 6a. One end of the second short tube portion 6a is formed with a gap 6b that is received in the porcelain tube receiving port 3a, and the other end is a rubber ring that receives the port 5c of the first short tube portion 5a. A receiving port 6c is formed.
[0004]
[Non-Patent Document 1]
Editors: “PVC Pipe and Fitting Association”, “JPPFA Hard PVC Pipe for Sewerage AS19”, revised on July 1, 2002, page 15
[0005]
[Problems to be solved by the invention]
However, in the conventional repair joint 4 shown in FIG. 13, the pipe bottom 2 b of the outlet 2 a of the upstream pipe 2 formed by cutting the sewer pipe 1, and the pipe bottom 5 d of the first short pipe portion 5 a For example, it is difficult to match the heights. Because, when connecting the differential port 2a of the upstream pipe line 2 to the first receiving port 5b, a gap 5e between the outer peripheral surface of the differential port 2a and the inner peripheral surface of the first receiving port 5b is made of mortar or the like. Since the bonding material 7 is filled, this gap 5e is indispensable, but it is difficult to set the dimension of this gap 5e accurately. The reason why the dimension of the gap 5e cannot be set accurately is that the first receiving port 5b cannot be positioned with respect to the differential port 2a. For example, when the gap 5e near the tube bottom of the difference port 2a becomes narrow, the tube bottom 2b of the difference port 2a at this joint becomes lower than the tube bottom 5d of the first short tube portion 5a, and a reverse step is formed.
[0006]
[Means for Solving the Problems]
In the first invention, a receiving port for receiving an end portion of a ceramic tube or a fume tube is formed at one end of the short tube portion. Inside And end Outside Position the pipe bottom at the end of a synthetic resin joint where the gap is sealed with a bonding material And suppresses the outflow of the bonding material filled in the gap. Protrusions for Over a predetermined range along the circumferential direction of the inner surface of the opening edge of the receiving port It is the connection joint characterized by having formed.
[0007]
According to a second aspect of the present invention, first and second receiving ports for receiving end portions of a ceramic tube, a fume tube and the like are formed at one end of each of the first and second short tube portions. mouth Inside And end Outside And a rubber ring receiving port formed in the other end of the first short tube portion to receive a gap formed at the other end of the first short tube portion. Resin repair joint smell Position the bottom of the tube And suppresses the outflow of the bonding material filled in the gap. Protrusions for Over a predetermined range along the circumferential direction of the inner surface of each opening edge of the first and second receiving ports It is the joint for repair characterized by having formed.
[0008]
Therefore, the main object of the present invention is to provide a connecting joint and a repair that can repair a pipe formed of a ceramic pipe or the like with a relatively narrow excavation hole without causing a reverse step in a joint portion with the ceramic pipe or the like. Is to provide a joint.
[0009]
[Means for Solving the Problems]
The first invention is a synthetic resin in which a receiving port for receiving an end portion of a ceramic tube, a fume tube or the like is formed at one end of a short tube portion, and a gap between the receiving port and the end portion is sealed with a bonding material In the connection joint made of the present invention, the connection joint is characterized in that a protrusion for positioning the tube bottom at the end is formed inside the receiving port.
[0010]
According to a second aspect of the present invention, first and second receiving ports for receiving end portions of a ceramic tube, a fume tube and the like are formed at one end of each of the first and second short tube portions. A rubber ring receiving opening in which the gap between the opening and the end is sealed with a bonding material and the other end of the first short tube is received at the other end of the second short tube Is a synthetic resin repair joint formed with protrusions for positioning the bottom of the end of a ceramic tube or the like inside each of the first and second receiving ports. It is a joint for repair.
[0011]
[Action]
According to the first and second inventions, it is possible to connect an outlet such as a ceramic tube or a fume tube to the receiving port, the first receiving port, and the second receiving port (hereinafter simply referred to as “receiving port”). When connecting an outlet such as a ceramic tube to the receptacle, the receptacle is fitted into the receptacle and placed on the protrusion. Accordingly, it is possible to position an outlet such as a ceramic tube with respect to the short tube portion, the first short tube portion and the second short tube portion (hereinafter simply referred to as “short tube portion”). Since positioning can be performed in this way, the bottom of each short tube and the bottom of a ceramic tube or the like connected to each short tube can be made, for example, the same height.
[0012]
In addition, when a notch is formed in the receptacle, a bonding material such as mortar is supplied from the notch in a state where the receptacle such as a ceramic tube is placed on the protrusion in the receptacle, and the gap between the receptacle and the receptacle This bonding material can be filled in a gap formed between them. In this way, the gap between the opening and the receiving port can be sealed with the bonding material to join the two. Therefore, for example, even when the space between the opening edge of the receiving port and the excavation wall surface is narrow in a state where the receiving port is fitted to a ceramic tube or the like protruding from the excavation wall surface, It can be filled reliably from the total space of the space and notch. Therefore, it is not necessary to secure a comparatively large space for filling the bonding material between the opening edge of the receiving port and the excavation wall surface, and the excavation area can be reduced by the notch, which is economical.
[0013]
According to the connection joint according to the first aspect of the invention, when the other end of the short pipe portion is formed as, for example, a slot or a rubber ring socket, the other end can be joined to a rubber ring socket or a slot made of synthetic resin, for example. . Thereby, a ceramic pipe etc. and a synthetic resin pipe can be connected via this connection joint.
[0014]
When repairing a buried existing sewage pipe formed of, for example, ceramic pipe using the repair joint according to the second aspect of the invention, first, the ground is excavated to expose parts such as breakage of the existing sewage pipe Let Then, for example, a damaged portion of the existing sewer pipe is cut and removed. Next, the repair joint is attached between the upstream port of the existing sewer pipe formed by this cutting and the downstream port. Then, the bonding material is filled in the gaps between the inner peripheral surfaces of the first and second receiving ports and the outer peripheral surfaces of the upstream and downstream differential ports. Then, by refilling the excavation hole, the repair of the damaged portion of the existing sewer pipe is completed.
[0015]
In addition, a 1st receiving port is connected to an upstream side outlet among the two outlets formed by cut | disconnecting an existing sewer pipe, and a 2nd receiving port is connected to a downstream side opening. And since the 1st short pipe part and the 2nd short pipe part are rubber ring joined, this joint for repair can be expanded-contracted. Therefore, the length of the repair joint can be adjusted according to the distance between the upstream side outlet and the downstream side outlet.
[0016]
【The invention's effect】
According to the first and second inventions, the bottoms of the short pipe part, the first short pipe part and the second short pipe part and the bottoms of ceramic pipes and the like connected to each short pipe part are positioned. Therefore, the pipe bottoms connected to each other can be connected at the same height. Therefore, it is possible to prevent sewage or mud from accumulating at this connection part and its upstream side.
[0017]
In the repair joint according to the second aspect of the invention, the first and second receiving ports at both ends of the joint are connected to the cut ends (differential ports) of the existing pipe line. It is not necessary to dig so that the receiving port is arranged in the part. Therefore, unlike the prior art shown in FIG. 13, there is no need to widen the excavation hole in order to expose the receiving port of the existing pipe line, which is economical.
[0018]
The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.
[0019]
【Example】
A repair joint according to a first embodiment of the present invention will be described with reference to FIGS. This repair joint 10 is made of synthetic resin. As shown in FIG. 1, for example, when a part of an embedded existing sewage pipe 12 formed by a ceramic pipe or a fume pipe is damaged, the damage The part can be repaired. As shown in FIG. 1, the repair joint 10 includes a first connection joint 14 and a second connection joint 16.
[0020]
The 1st connection coupling 14 has the 1st short pipe part 18, as shown in FIG. A first receiving port 22 to which, for example, a ceramic tube port 20 is connected is formed at one end of the first short tube portion 18, and a port 24 is formed at the other end. The inner diameter of the first receiving port 22 is larger than the inner diameter of the first short tube portion 18, and the center thereof coincides with the center of the first short tube portion 18. And the ceramic pipe 26 which comprises the sewer pipe 12 is provided with the short pipe part 26a and the receiving port 26b, as shown to FIG. 2 (A).
[0021]
A projection 28 for positioning the bottom of the ceramic tube 26 is formed on the inner surface of the first receiving port 22. As shown in FIG. 1, the protrusion 28 has a pipe bottom (upstream side opening 20) in a state where the upstream side opening 30 (upstream side opening) 20 is fitted in the first receiving port 22. The inner surface 20a and the tube bottom (inner surface) 18a of the first short pipe portion 18 are formed at the same height H1. As shown in FIG. 3, each of the protrusions 28 has the same shape and is composed of three arc-shaped members having a rectangular cross-sectional shape. The upper surfaces of the three protrusions 28 are formed with a curvature that contacts the outer surface of the upstream side opening 20. The protrusions 28 have the same height on the both sides from the bottom of the first receiving port 22 over the range of θ1 (≈120 °) along the circumferential direction of the first receiving port 22 with a predetermined interval therebetween. It is made of H1. The three protrusions 28 are bonded to the inner surface of the first receiving port 22, and are stably held so that the positional relationship between the upstream receiving port 20 contacting the upper surface and the first receiving port 22 does not shift. it can.
[0022]
Each protrusion 28 is formed along the inner surface of the opening edge of the first receiving port 22 as shown in FIG. Thus, since each protrusion 28 is formed along the opening edge and in the lower part of the first receiving port 22, the outer peripheral surface of the upstream side opening 20 and the inner peripheral surface of the first receiving port 22 are formed. The bonding material 32 such as mortar and epoxy filled in the gap 36 can be prevented from flowing out from the portion of the gap 36 where the projections 28 are formed. Furthermore, the width W1 of each protrusion 28 is about 14% of the width (depth) W2 of the first receiving port 22. In this way, by setting the width W1 of each protrusion 28, the gap 36 between the outer peripheral surface of the upstream side opening 20 and the inner peripheral surface of the first receiving port 22 can be reliably sealed by the bonding material 32. Both can be reliably combined.
[0023]
Further, as shown in FIG. 3, the top (upper part) of the opening edge of the first receiving port 22 is used for filling the bonding material over the range of θ2 (≈90 °) along the circumferential direction of the first receiving port 22. A notch 34 is formed. The width of the notch 34 (the width of the first receiving port 22 in the depth direction) W3 is about 36% of the width W2 of the first receiving port 22. Thus, by setting the width W3 of the notch 34, the joining material 32 is supplied by hand, for example, from the space K1 including the notch 34, and the outer peripheral surface of the upstream side inlet 20 and the first receiving port 22 The bonding material 32 can be filled in the gap 36 with the inner peripheral surface. And this clearance gap 36 can be sealed reliably, and both can be couple | bonded reliably.
[0024]
The 2nd connection coupling 16 has the 2nd short pipe part 38, as shown in FIG. A second receiving port 40 to which, for example, a porcelain tube outlet (a downstream port 44) 46 is connected is formed at one end of the second short pipe portion 38, and a rubber ring is formed at the other end. A receiving opening 42 is formed. The rubber ring receiving opening 42 is formed to have the same diameter as the second short tube portion 38, and an annular rubber ring receiving portion 42a is formed along the inner periphery of the opening end. A rubber ring 42b is attached to the rubber ring receiving portion 42a. The rubber ring receiving opening 42 is formed so that the outlet 24 of the first short pipe portion 18 is joined.
[0025]
As shown in FIG. 4, the second receiving port 40 has the same size and shape as the first receiving port 22, and includes three protrusions 28 for positioning the bottom of the ceramic pipe (downstream side opening 46), and A notch 34 for filling the bonding material is formed. These three protrusions 28 and the notch 34 are equivalent to those provided in the first receiving port 22.
[0026]
However, the center of the second receiving port 40 is eccentrically formed by S1 on the tube bottom 38a side of the second short tube portion 38 with respect to the center of the second short tube portion 38. This eccentric amount S1 is the total dimension of the thickness of the first short tube portion 18 and the gap between the first short tube portion 18 and the second short tube portion 38. As a result, as shown in FIG. 1, the tube bottom (inner surface) 46 a of the downstream side opening 46 and the tube of the second short tube portion 38 in a state where the downstream side opening 46 is fitted in the second receiving port 40. The bottom (inner surface) 38a has the same height.
[0027]
And, if the center of the second receiving port 40 is decentered by S1 from the center of the second short tube portion 38 toward the tube bottom 38a side of the second short tube portion 38, The tube bottom 46a of the downstream side inlet 46 coincides with the height of the tube bottom 18a of the first short tube portion 18, but the tube bottom 46a of the downstream side inlet 46 is more than the tube bottom 38a of the second short tube portion 38. This is because the thickness of the first short pipe portion 18 and the total dimension of the gap between the first short pipe portion 18 and the second short pipe portion 38 (the amount of eccentricity S1) increase, resulting in a reverse step. Therefore, the height H1 of the projection 28 formed in the second receiving port 40 is set to the total dimension of the thickness of the first short tube portion 18 and the gap between the first short tube portion 18 and the second short tube portion 38. By forming the lower portion S1 lower, the center of the second receiving port 40 is not decentered by S1 (the centers of the second receiving port 40 and the second short pipe portion 38 are matched), and the downstream side opening 46 is The tube bottom 46 a can be made to coincide with the height of the tube bottom 38 a of the second short tube portion 38.
[0028]
Further, as shown in FIG. 1, by setting the height of the projection 28 of the first receiving port 22 to H1, the height of the tube bottoms 20a, 18a of the upstream side differential port 20 and the first short pipe portion 18 is set. However, instead of this, the height of the projection 28 of the first receiving port 22 may be slightly higher than H1. Then, the height of the projection 28 of the second receiving port 40 is set to H1, so that the heights of the downstream bottom 46 and the bottoms 46a, 38a of the second short tube portion 38 are matched. Instead, the height of the protrusion 28 of the second receiving port 40 may be slightly lower than H1. In this way, the pipe bottom 20a of the upstream side outlet 20 becomes higher than the pipe bottom 18a of the first short pipe part 18, and the pipe bottom 38a of the second short pipe part 38 becomes the pipe bottom 46a of the downstream side outlet 46. Higher than. The sewage flows smoothly without collecting at each joint.
[0029]
FIG. 5 is a plan view of the repair joint 10 shown in FIG. 1, and shows the shape of the protrusion 28 appearing from the notches 34 of the first and second connection joints 14 and 16. FIG. 6 is a left side view and a right side view of the repair joint 10 shown in FIG. 1 and shows a state where the second receiving port 40 is eccentric with respect to the first receiving port 22.
[0030]
Next, a procedure for repairing, for example, an existing ceramic pipe sewage pipe 12 embedded using the repair joint 10 will be described with reference to FIGS. 1 and 2. First, the location of the existing sewage pipeline 12 such as breakage or water leakage is investigated. Then, as shown in FIG. 2A, in order to expose a portion such as the breakage, the ground is excavated to form an excavation hole 48. In this case, for example, if water leaks from the joint between the receiving port 26b and the outlet of the ceramic pipe 26, the existing sewer pipe 12 is removed as shown in FIG. Cut the water leak point. At this time, the protruding lengths of the upstream side differential port 20 and the downstream side differential port 46 of the existing sewage pipeline 12 formed by this cutting are K2. Next, as shown in FIG. 1, the repair joint 10 is attached between the upstream side opening 20 and the downstream side opening 46 formed by this cutting.
[0031]
When attaching the repair joint 10, first, for example, on the ground, in the first and second receiving ports 22, 40 of the repair joint 10, a range where the projections 28 are formed, or a range of that extent. Is filled with the bonding material 32. The reason why the bonding material 32 is filled in advance on the ground is that workability is better than filling in the excavation hole 48. Then, the bonding material 32 is filled in the area where the protrusions 28 are formed, etc., in a state where the repair joint 10 is attached so that the portion where the protrusions 28 are formed is on the lower side. This is because it is difficult to drop off from the filled portion.
[0032]
Then, as shown in FIG. 1, for example, the upstream side opening 20 is fitted into the first receiving port 22 to the back and is applied to the protrusion 28 to position the first receiving port 22 with respect to the upstream side opening 20. . The protrusion 28 is disposed on the lower side. And in order to hold | maintain this applied state, this 1st receiving port 22 is fixed with the fixing materials 50, such as soil. Similarly, the downstream side opening 46 is fitted into the second receiving port 40 to the back and is applied to the protrusion 28 to position the second receiving port 40 with respect to the downstream side opening 46. The protrusion 28 is disposed on the lower side. And in order to hold | maintain this applied state, this 2nd receiving port 40 is fixed with fixing materials 50, such as soil. In this state, the heights of the upstream side outlet 20 of the existing sewer pipe 12 made of ceramic pipe and the bottoms 20a and 18a of the first short pipe part 18 are the same, and the downstream side outlet 46 and The heights of the tube bottoms 46a, 38a of the second short tube portion 38 are also the same.
[0033]
Next, the joining material 32 such as mortar is supplied from the space K1 including the notches 34 formed in the first and second receiving ports 22 and 40, and the outer peripheral surface of the upstream side opening 20 and the first receiving port 22 and the gap 36 formed between the outer peripheral surface of the downstream side opening 46 and the inner peripheral surface of the second receiving port 40. Fill. When the filled bonding material 32 is solidified, the gap 36 between the upstream side opening 20 and the first receiving port 22 and the gap 36 between the downstream side opening 46 and the second receiving port 40 become the bonding material 32. The upstream side opening 20 and the first receiving port 22, and the downstream side opening 46 and the second receiving port 40 are coupled to each other. Thereafter, the excavation hole 48 is backfilled. Thereby, the repair of the damaged part of the existing sewer pipe 12 is completed.
[0034]
According to the repair joint 10 shown in FIG. 1, the second short pipe portion 38 and the downstream side are further arranged so that the upstream bottom 20 and the bottoms 20 a of the first short pipe portion 18 have the same height. The upstream and downstream differential ports 20, 46 can be positioned by the protrusions 28 so that the tube bottoms 38 a, 46 a of the lateral differential ports 46 have the same height. Therefore, it is possible to prevent sewage or mud from accumulating at each connection portion and its upstream side.
[0035]
And, for example, the space between the opening edge 22a of the first receiving port 22 and the excavation wall surface 48a in a state where the first receiving port 22 is fitted to the upstream side opening 20 protruding from the excavation wall surface 48a ( Since the notch 34 is formed even when the interval K3 is narrower than the space K1 required for filling the bonding material 32, the bonding material 32 is the sum of the space K3 and the space W3 of the notch 34. It can be reliably filled from the space K1. Therefore, it is not necessary to secure a relatively wide space K1 for filling the bonding material between the opening edge portion 22a of the first receiving port 22 and the excavation wall surface 48a, and it is only necessary to secure the space K3. The excavation area of the excavation hole 48 can be narrowed by W3 (= K1-K3), which is economical. Since the space (interval) between the opening edge 40a of the second receiving port 40 and the excavation wall surface 48a is also K3, the excavation area is reduced by a total of 2 × W3 compared to the conventional case shown in FIG. be able to. And in this case, each protrusion length K2 from the excavation wall surface 48a of the upstream side and downstream side differential openings 20, 46 can be made shorter by W3 than the case shown in FIG.
[0036]
Conventionally, as shown in FIG. 13, the receiving port 3 a is exposed because the porcelain tube receiving port 3 a needs to be disposed at the end of the downstream side pipe 3 protruding from the excavation wall surface 48 a. It is necessary to widen the excavation hole 48. In contrast, in the repair joint 10, the first and second receiving ports 22 and 40 at both ends are connected to the upstream and downstream differential ports (cut ends) 20 and 46. It is not necessary to excavate so that the receiving port 3a is disposed at the downstream end. Therefore, it is economical because it is not necessary to widen the excavation hole 48 in order to expose the receiving port 3a of the ceramic pipe.
[0037]
Since the outlet 24 of the first short pipe section 18 and the rubber ring receiving opening 42 of the second short pipe section 38 are joined by a rubber ring, the repair joint 10 can be expanded and contracted. Therefore, the length of the repair joint 10 can be adjusted according to the distance between the upstream side opening 20 and the downstream side opening 46. FIG. 7A shows a state where the repair joint 10 is extended, and FIG. 7B shows a state where the repair joint 10 is shortened.
[0038]
Next, the repair joint 52 of the second embodiment will be described with reference to FIGS. The difference between the first embodiment and the second embodiment of the repair joint is that the shape of the second connection joint 54 is different as shown in FIGS. 1 and 8.
[0039]
As shown in FIG. 8, the second connection joint 54 of the second embodiment has a wider range than the upper semicircular portion in the annular coupling portion where the second short pipe portion 38 and the second receiving port 40 are coupled. A reduced diameter portion 56 is formed over the entire area. Other than this, it is equivalent to the repair joint 10 of the first embodiment, and the equivalent parts are denoted by the same reference numerals, and detailed description thereof is omitted.
[0040]
The reduced diameter portion 56 formed in the second short tube portion 38 is formed following the cylindrical portion formed on the rubber ring receiving port 42 side, and is inclined at a predetermined angle with respect to the tube axis. It extends toward the second receiving port 40 while approaching the shaft. The reduced diameter portion 56 is coupled to a funnel-shaped inclined portion 58 formed at the back of the second receiving port 40. FIG. 9 is a view of the second connection joint 54 as viewed from the second receiving port 40 side.
[0041]
According to the repair joint 10 shown in FIG. 8, when the insertion port 24 of the first connection joint 14 is joined to the rubber ring receiving port 42 of the second connection joint 54 and inserted toward the back side, the insertion port 24. The front end of the first contact joint 14 abuts on the inner surface of the reduced diameter portion 56, and the first connection joint 14 can be locked so that it does not move toward the back side. Therefore, for example, even when the first short pipe portion 18 of the first connection joint 14 is longer than the second short pipe portion 38 of the second connection joint 54, the outlet 24 of the first connection joint 14 is connected to the second receiving port 40. It can prevent entering into an inner side or the state which the outlet 24 protrudes outside from the 2nd receiving port 40. FIG. In other words, when the outlet 24 of the first connection joint 14 enters the second receiving port 40, the outlet of the first connection joint 14 is used when the repair joint 10 is used. 24 needs to be moved from the position inside the second receiving port 40 or the position protruding outward from the position toward the second short pipe portion 38, and this work can be omitted. In addition, since the outlet 24 of the first short tube portion 18 is locked by the reduced diameter portion 56 so as not to enter the inside of the second receiving port 40, the outer surface of the first short tube portion 18 is formed. The bonding material 32 filled in the second receiving port 40 is prevented from adhering, or the bonding material 32 adhering to the outer surface of the first short tube portion 18 is not adhered to the inner surface of the second short tube portion 38. Can do.
[0042]
Next, the repair joint 60 of the third embodiment will be described with reference to FIGS. 10 and 11. The difference between the second embodiment and the third embodiment of the repair joint is that the first and second connecting joints 14 and 54 are first and second as shown in FIGS. The shapes of the tube bottom positioning projections 62 formed at the receiving ports 22 and 40 and the portions where the projections 62 of the first and second receiving ports 22 and 40 are formed are different.
[0043]
In the third embodiment, the protrusion 62 formed on the first receiving port 22 of the first connecting joint 14 faces the inside of the first receiving port 22 as in the first embodiment, as shown in FIG. It is formed to protrude. The protrusion 62 is formed in a state where the upstream side outlet 20 (ceramic pipe outlet) is fitted in the first receiving port 22, and the pipe bottom 20 a of the upstream side outlet 20 and the pipe bottom of the first short pipe portion 18. It is formed at a height H1 so that 18a has the same height. 10 and 11A, the protrusion 62 is formed by bending the opening edge 22a of the first receiving port 22 inward, and the bottom of the first receiving port 22 is formed. Are continuously formed at the same height H1 over the range of θ1 (≈120 °) along the circumferential direction of the first receiving port 22 on both sides. As a result, as in the first embodiment, the protrusion 62 can be stably held so that the positional relationship between the upstream side opening 20 and the first receiving port 22 contacting the upper surface does not shift. Further, as shown in FIG. 10, the protrusion 62 is formed so as to be in surface contact with the outer surface of the upstream side opening 20.
[0044]
Thus, since the protrusion 62 is continuously formed along the opening edge 22a and is formed at the lower part of the first receiving port 22, the outer peripheral surface of the upstream side opening 20 and the first receiving port are formed. It is possible to reliably prevent the bonding material 32 filled in the gap 36 between the inner peripheral surface 22 and the inner surface of the gap 22 from flowing out from the portion of the gap 36 where the projections 62 are formed. Since the projection 62 is formed by bending the first receiving port 22, the number of parts can be reduced as compared with the case where the projection 62 is formed by a component different from the first receiving port 22.
[0045]
The protrusion 62 formed in the second receiving port 40 has the same size and shape as the protrusion 62 formed in the first receiving port 22 as shown in FIGS. 10 and 11B. Therefore, the description is omitted.
[0046]
Next, the connection joint 64 of the fourth embodiment will be described with reference to FIG. This connection joint 14 can be connected to a ceramic pipe 26, a fume pipe, or the like, similarly to the first connection joint 14 of the first embodiment shown in FIG. This connection joint 64 is formed by making the length of the short pipe portion 66 shorter than the first short pipe portion 18 of the first connection joint 14. Other than this, since it is equivalent to the first connection joint 14 of the first embodiment, the equivalent parts are denoted by the same reference numerals, and detailed description thereof is omitted.
[0047]
According to this connection joint 64, as shown in FIG. 12, the ceramic pipe 26 and the single-piece receiving pipe 70 made of a synthetic resin in which, for example, a rubber ring receiving opening 68 is formed can be connected. Since the diameter of the rubber ring receiving port 68 is increased, the pipe bottoms 26c, 66a, and 70b of the ceramic pipe 26, the short pipe portion 66 of the connecting joint 64, and the main body 70a of the single receiving pipe 70 are connected to each other. Can be the same height.
[0048]
However, the first receiving port 22 and the like of the first to fourth embodiments are sized and shaped to connect the outlets 20 and 46 of the ceramic pipe 26, but instead, connect the outlet of the fume pipe. It is good also as a magnitude | size and shape which can be performed.
[0049]
In the first, second and fourth embodiments, the three protrusions 28 are formed on the inner surface of the first receiving port 22 and the like at intervals, but instead, they are formed as one continuous protrusion. Also good. The protrusion 28 is formed as an arcuate member extending in the circumferential direction along the opening edge 22a of the first receiving port 22 or the like. Instead, the protrusion 28 is formed as a linear member extending in the tube axis direction. A plurality may be arranged at intervals in the circumferential direction of the mouth.
[0050]
That is, the projections 28 and the like formed on the inner surfaces of the first receiving port 22 and the like of the first to fourth embodiments may have other shapes, and the range θ1 where the projections are formed is also other ranges. It is good. Further, the position in the depth direction and the range in the depth direction on the inner surface of the first receiving port 22 and the like where the projections 28 and the like are formed may be other than this. In short, what is necessary is just to make it show the effect | action and effect similar to the said 1st-4th Example.
[0051]
Further, in the fourth embodiment, as shown in FIG. 12, one end of the short pipe portion 66 of the connection joint 64 is formed as a difference port so that the difference port can be joined to the rubber ring receiving port 68. Instead, the one end of the short tube portion 66 can be adhesively bonded to the synthetic resin tube through a socket, for example. Further, a rubber ring receiving port may be formed at one end of the short tube portion 66, and a synthetic resin pipe opening may be joined to the rubber ring receiving port.
[0052]
Furthermore, in the first to fourth embodiments, the notch 34 for filling the bonding material is formed in the first receiving port 22 and the like, but the notch 34 may not be formed.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a use state of a repair joint according to a first embodiment of the present invention.
2A is a longitudinal sectional view showing an existing sewage pipeline repaired by the repair joint according to the first embodiment of FIG. 1, and FIG. 2B is a view of the existing sewage pipeline shown in FIG. It is a longitudinal cross-sectional view which shows the state which cut | disconnected and removed the damaged part.
3A is a cross-sectional view of the second connection joint provided in the repair joint according to the first embodiment of FIG. 1 as viewed from the direction of IIIB-IIIB in FIG. 3B, and FIG. It is a left view of the 2nd connection joint shown to A).
4A is a cross-sectional view of the second connection joint provided in the repair joint according to the first embodiment of FIG. 1 as viewed from the IVA-IVA direction of FIG. 4B, and FIG. It is a right view of the 2nd connection coupling shown to A).
FIG. 5 is a plan view showing a repair joint according to the first embodiment of FIG. 1;
6A is a left side view showing the repair joint according to the first embodiment of FIG. 5, and FIG. 6B is a right side view showing the repair joint according to the first embodiment of FIG. 5;
7A is a longitudinal sectional view showing a state where the repair joint according to the first embodiment of FIG. 5 is extended, and FIG. 7B is a state where the repair joint according to the first embodiment of FIG. 5 is shortened. FIG.
FIG. 8 is a longitudinal sectional view showing a repair joint according to a second embodiment of the present invention.
FIG. 9 is a right side view of a second connection joint provided in the repair joint according to the second embodiment of FIG. 8;
FIG. 10 is a longitudinal sectional view showing a use state of a repair joint according to a third embodiment of the present invention.
11A is a left side view showing the repair joint according to the third embodiment of FIG. 10, and FIG. 11B is a right side view showing the repair joint according to the third embodiment of FIG.
FIG. 12 is a longitudinal sectional view showing a usage state of a repair joint according to a fourth embodiment of the present invention.
FIG. 13 is a longitudinal sectional view showing a use state of a conventional repair joint.
[Explanation of symbols]
10, 52, 60 ... Repair joint
12 ... Existing sewer pipe
14 ... 1st connection joint
16, 54 ... 2nd connection coupling
18 ... 1st short pipe part
18a, 20a, 26c, 38a, 46a, 66a ... tube bottom
20 ... Upstream side outlet
22 ... 1st port
22a, 40a ... opening edge
24 ...
28, 62 ... projection
30 ... Upstream pipeline
32. Bonding material
34 ... Notch
36 ... Gap
38 ... 2nd short pipe part
40 ... Second entrance
42. Rubber ring socket
44 ... Downstream pipe
46 ... downstream side outlet
56 ... Reduced diameter portion
64 ... Connection joint
66… Short pipe section

Claims

A synthetic resin in which a receiving port for receiving an end portion of a ceramic tube or a fume tube is formed at one end of the short tube portion, and a gap between the inner surface of the receiving port and the outer surface of the end portion is sealed with a bonding material In connection fittings made of
A protrusion for positioning the tube bottom of the end portion and suppressing the outflow of the bonding material filled in the gap extends over a predetermined range along the circumferential direction of the inner surface of the opening edge of the receiving port. A connecting joint, characterized in that it is formed.

The connection joint according to claim 1 , wherein the protrusion is formed by bending the opening edge of the receiving port inward .

First and second receiving ports for receiving ends of porcelain tubes, fume tubes and the like are formed at respective one ends of the first and second short tube portions, and the inner surfaces of the first and second receiving ports and the A rubber ring holder in which a gap between each end and the outer surface is sealed with a bonding material, and a second end formed at the other end of the first short tube portion is received at the other end of the second short tube portion. mouth Te repair joint smell made formed synthetic resin,
A protrusion for positioning the tube bottom of the end portion and suppressing the outflow of the bonding material filled in the gap is provided in the circumferential direction of the inner surface of each opening edge of the first and second receiving ports. A repair joint, characterized by being formed over a predetermined range along .

4. The repair joint according to claim 3 , wherein the protrusion is formed by bending the opening edge of each of the first and second receiving ports inward .

The first receiving port is disposed upstream of the second receiving port,
The repair joint according to claim 3 or 4 , wherein the protrusion of the first receiving port is formed to have a predetermined dimension higher than the protrusion of the second receiving port .

The first receiving port is disposed on the upstream side of the second receiving port,
5. The repair joint according to claim 3, wherein the second receiving port is formed to be eccentric to a predetermined dimension tube bottom side with respect to the second short tube portion.